899818669 has 2 divisors, whose sum is σ = 899818670. Its totient is φ = 899818668.

The previous prime is 899818607. The next prime is 899818681. The reversal of 899818669 is 966818998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473932900 + 425885769 = 21770^2 + 20637^2 .

It is a cyclic number.

It is not a de Polignac number, because 899818669 - 2⁷ = 899818541 is a prime.

It is a super-2 number, since 2×899818669² = 1619347274161863122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 899818669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899818069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449909334 + 449909335.

It is an arithmetic number, because the mean of its divisors is an integer number (449909335).

Almost surely, 2^899818669 is an apocalyptic number.

It is an amenable number.

899818669 is a deficient number, since it is larger than the sum of its proper divisors (1).

899818669 is an equidigital number, since it uses as much as digits as its factorization.

899818669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 64.

The square root of 899818669 is about 29996.9776644248. The cubic root of 899818669 is about 965.4245383409.

The spelling of 899818669 in words is "eight hundred ninety-nine million, eight hundred eighteen thousand, six hundred sixty-nine".